/*
 * Copyright 2017 Datamountaineer.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.datamountaineer.streamreactor.connect.elastic5.indexname

import java.time.Clock
import java.time.LocalDateTime._
import java.time.format.DateTimeFormatter._

object ClockProvider {
  val ClockInstance: Clock = Clock.systemUTC()
}

sealed trait IndexNameFragment {
  def getFragment: String
}

case class TextFragment(text: String) extends IndexNameFragment {
  override def getFragment: String = text
}

case class DateTimeFragment(dateTimeFormat: String, clock: Clock = ClockProvider.ClockInstance) extends IndexNameFragment {
  override def getFragment: String = s"${now(clock).format(ofPattern(dateTimeFormat))}"
}
object DateTimeFragment {
  val OpeningChar = '{'
  val ClosingChar = '}'
}
